Would it be fine if...

Hey, I'm new to the forum, but am very happy I ran across it, I am living in Buenos Aires now and will be here for about 4 months. My spanish is pretty good but there are so many times I get caught up on certain phrases and it always takes me forever to write texts or emails so its good to have this resource, so my first question: I was invited to go out friday by a friend who has a connection at a boliche that can get us in no cover, I want to text her asking if i can invite a friend (that she has already met), so how would i say:

"hey I'm in to go friday for sure, would it be alright if I invite _____ to join?"

I tried but dont want to screw up and sound demanding or too formal or something. Thanks.